Home / 28,719.21-39,621.27-21,183.48

Finding the Fourth Proportional to 28,719.21, 39,621.27 and 21,183.48

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Solution

The fourth proportional to 28,719.21, 39,621.27 and 21,183.48 is: 29,224.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.21 : 39,621.27 = 21,183.48 : x
  2. Step 2: Convert to fraction form
    28,719.21/39,621.27 = 21,183.48/x
  3. Step 3: Cross multiply
    28,719.21x = 39,621.27 × 21,183.48
  4. Step 4: Simplify right side
    28,719.21x = 839,316,380.62
  5. Step 5: Solve for x
    x = 839,316,380.62/28,719.21
  6. Step 6: Final answer
    x = 29,224.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.